noun (plural villi /ˈvɪlʌɪ/ /ˈvɪliː/)Anatomy
1Any of numerous minute elongated projections set closely together on a surface, in particular:
- Mutants were observed as non-staining ribbons on the surface of the villus.
- And the tiny hair-like projections on the cells - the villi (VIL-li) - shrink and may even disappear.
- The colon can be identified by its size and the absence of mucosal folds and villi; the inner surface is smooth.
1.1A finger-like projection of the lining of the small intestine.
- The inner lining of the large intestine lacks the villi that characterize the small intestine.
- The lining of the small intestine is folded into finger-like projections, the villi, and deeper glands, the crypts.
- They are absorbed by the villi of the small intestine and carried by the portal vein to the liver.
- Example sentences
- On opening, the colon revealed numerous wormlike or villiform polyps covering almost the entire segment of the sigmoid colon.
- In some areas the mucosa lining the cyst had a slightly villiform appearance, whereas elsewhere it was flattened and simplified.
- Although the neoplasm contained numerous capillary-sized vessels, clefted spaces and villiform structures were not apparent.
- Example sentences
- The villose spineflower occurs from Point Reyes in Marin Co., California, to Bodega Bay in Sonoma Co.
- It is easily recognized by its long, stiff (villose) hairs for which it received its specific epithet.
- Flowers in fascicles, pedicels long, slender and villose, 1-5 flowers per inflorescence, 15-25 mm long, calyx obconic and four-ribbed, 4-lobed, white, campanulate, contracted into a stigmatic apex, stamens 8-16; flowers appear March to May.
Early 18th century: from Latin, literally 'shaggy hair'.
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